Motor-controller.



A. J. HORTON.

MOTOR CONTROLLER.

APPLICATION FILED O0T.16, 1911.

Patented July 28, 1914,

ill ll 7 UNITED sra'rns rarnrrr onrron.

ALBERT J. HORTON, F WHITE PLAINS, NEW YORK, ASSIGNOR TO THE CUTLER- HAMMER MFG. 00., OF MILWAUKEE, WISCONSIN, A CORPORATION OF WIS- GONSIN'.

MOTOR-CONTRULLEP... 7

specification of Letters Patent.

Patented. July 28, 1914.

To all whom it may concern Be it known that I, ALBERT J. HORTGN, a citizen of the United States, residing at White Plains, in the county of W estchester and State of New York, have invented new and useful Improvements in Motor-Controllers, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawing, forming a part of this specification.

My invention relates to improvements in circuit controlling devices.

It is one of theobjects of my invention to provide a simple and efficient reversing and resistance controlling device. I

Various'other objects and advantages of my invention will be hereinafter clearly and fully set forth.

In order to clearly disclose the nature and characteristic features of my invention, I shall describe the device illustrated in the accompanying drawing which embodies my invention in one stood however, that my invention is not limited to the specific device illustrated, but may be embodied in various different forms and adapted for use in various different relations.

In the accompanying drawings :Figure 1 is a front elevation of the device and Fig. 2 is a diagrammatic view showing one application of the device illustrated in Fig. 1.

The device which I have selected for the purpose of illustration is particularly applicable for starting and reversing electric motors. It includes two pivoted contact members 1 and 2 fulcrumed on pins 3 and 4 respectively, projecting from a suitable insulating supporting panel 5. These arms are preferably arranged in the manner illus trated, but might be arranged in various other ways if desired. It is desired to have these arms move together, and to accomplish this I have connected the same by an insulating link 6 pivoted at one end to a stud 7 on the arm 1, and at its opposite end to a stud 8 on the arm 2. Any suitable operatlng means may be provided for moving these arms. In practice however, itis often desirable to operate such a device by means of a reciprocating rod connected to a limit device on the machine operated by the motor. I have accordingly provided a pin 9 on the link 6 to which such a rod may be conveniently connected. Also one of the objects form. It should be under in mounting the arms 1 and 2 in the manner illustrated is to permit operation of the arms by a straight line or substantially straight line movement of such an operating rod. It should be understood however that any other form of operating means may be employed The normal position of the arms 1 and 2 1s that shown in Fig. 1 in which both arms are vertically disposed and parallel to one another. For yieldingly holding the arms in this position I have provided leaf springs 10 and 11 mounted upon the panel 1 and bearlng against mitered corners at the free eX- tremities of the arms. These springs however are so arranged as to permit the arms to be readily moved from normal position.

Three sets of contacts 12, 13 and 14 are provided to be engaged by these arms, the contacts 13 not being visible in Fig. 1. The contacts 12 are arranged substantially concentric with the pivot of the arm 1, while the contacts 14 are arranged substantially concentric with the pivot of the arm 2. The contacts 13 are arranged in an oblique straight line between the contacts 12 and 14. With this arrangement the contacts 12 are only within the range of the arm 1, the contacts 14 only in the range of the arm 2, while the contacts 13 are within the range of both arms.

The operation and functions of the device shown in Fig. 1 will be best understood by reference to the diagrammatic View Fig. 2. In this view I have shown the device arranged to control an electric motor 15 provided with an armature A and a shunt field winding F. The device shown in Fig. 1 is utilized to control a resistance 16 in'series with the motor armature and also to control the connections between the motor. armature and the supply circuit topvary the direction of operation of the motor.

Current is supplied from main lines 17 and 18. With the arms in normal position as shown, the motor circuit is open since the contacts upon which the arms rest in this position are dead. The contacts 13 are connected to main line 18, the contacts 12 and 14 are connected to the resistance 16 and to main line 17, while the arms 1 and 2 are connected to opposite terminals of the motor armature.

Assuming now that the link connecting the two arms be moved t0 the left, circuit will be closed as follows :from main line 18 to contacts 13, thence through arm 2 by conductor 20 through the motor armature by conductor 21 through the arm 1, resistance 16 and conductor 22 to main line 17. The shunt field winding being permanently connected across the lines, the motor will be set in operation and it will be assumed that it operates in a clock wise direction. Continued movement of the arms to the left will gradually remove the resistance 16 until i right instead of to the left, circuit is closed from main line 18 through the arm 1 by cond uctor 21 through the motor armature in a reverse direction to that previously described, by conductor. 20 to the arm 2, buttons 14 and cross connections to buttons 12 through resistance 16 by conductor 22 to main line 17. The polarity of the armature being thus reversed, the motor operates in an opposite direction to that previously described .or counter-clockwise. Continued movement of the arms 1 and 2 to the right gradually removes the resistance 16 and brings the motor up to normal speed.

lVhile the device shown is particularly applicable to the control of electric motors, it might be used in various other relations for the accomplishment of various different purposes.

What I claim as new and desire to secure by Letters Patent is as follows 1. A combined rheostat and reversing de vice comprising two simultaneously movable contact members having adjacent contact portions, stationary cooperating contacts for said members, certain of the same being disposed between said members to be engaged by either of the same and resistance connected to certain of said contacts to be controlled by either of said contact members while the other contact member engages the former of said contacts.

2. A combined rheostat and reversing device comprising two ivoted arms projecting in opposite directions from their pivots and having their free ends contiguous, said arms being adapted for connect-ion to opposite sides of a circuit, cooperating stationarily mounted contacts, certain of said contacts being disposed between said arms in the range of both and adapted for connection to one side of a second circuit and other of said contacts being disposed on opposite sides of said arms and adapted for con nection to resistances and to the other side of said second circuit.

3. A combined rheostat and reversing device comprising two pivoted arms projecting in opposite directions from their pivots and having their free ends contiguous, said arms being adapted for connection to opposite sides of a circuit, an insulating link connecting said arms, a series of contacts between said arms in the range of both and adapted for connection to one side of a second circuit, twoother series of contacts each in the range of one of said arms, and resistances connected to said last two mentioned series of contacts.

4. In a controlling device for electric motors in combination, two simultaneously movable cont-act members connected to opposite sides of the motor armature, a set of contacts connected to one side of the supply circuit and adapted to be engaged by either of said arms, and two other sets of contacts connected to the other side of the supply circuit, one set for each of said arms, and resistances connected to said last two mentioned sets of contacts.

5. In a controlling device for electric motors in combination, an insulating panel, a pair of contact arms pivotally mounted upon said panel, said arms projecting in opposite directions from their pivots an insulating link connecting the free ends of said arms, a series of contacts between'said arms, and a series of resistance contacts on each side of said intermediate contacts.

6. A combined rheostat and reversing device comprising a supporting panel, two electrically independent and simultaneously movable contact members mounted thereon, a series of stationary cooperating contacts for each of said contact members, resistance connected to both of said series of contacts, and conducting means mounted upon said panel between said series of contacts to be engaged by either of said contact members during the movement of the other over its respective series of contacts.

7. A combined rheostat and reversing device comprising a supporting panel, two electrically independent and simultaneously movable contact members mounted thereon, a series of stationary cooperating contacts for each of said contact members, resistance connected to both of said series of contacts, and conducting means mounted upon said panel between said series of contacts to be engaged by either of said contact members during the movement of the other over its respective series of contacts, said contact members being movable to a position to disengage their respective series of cont-acts and also disengage said conducting means.

8. A combined rheostat and reversing device comprising a panel, two electrically independent but mechanically connected contact members pivotally mounted thereon, two series of resistance contacts mounted on said panel to be engaged by said contact members, conducting means mounted on said panel between said series of contacts to be engaged by either of said contact members during movement of the other to engage its respective series of contacts, said contact members being movable to positions to disengage their respective series of contacts, and also disengage said conducting means, and means releasably holding said cont-act members in such positions.

9. A combined rheostat and reversing device comprising a panel, two electrically independent but mechanically connected contact members pivot-ally mounted thereon, two series of contacts mounted on said panel to be. engaged by said contact members, conducting means mounted onsaid panel between said series of contacts to be engaged by either of said contact members during movement of the other to engage its respective series of contacts, said contact members being movable to positions to disengage bot-h their respective series of contacts and said conducting means, and a resilient latch associated with each of said members to releasably hold the same in such position.

In witness whereof, I have hereunto subscribed my name in the presence of two witnesses.

ALBERT J. HORTON. Witnesses:

WILLIAM L. CULLY, GEORGE J. MALLON. 

